Add process_* metrics similar to the metrics exposed by https://github.com/prometheus/client_golang
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/92
This commit is contained in:
Aliaksandr Valialkin
parent
2c308dd067
commit
5a9cdd0bef
64
go_metrics.go
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64
go_metrics.go
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@ -0,0 +1,64 @@
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package metrics
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import (
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"fmt"
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"io"
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"runtime"
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"github.com/valyala/histogram"
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)
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func writeGoMetrics(w io.Writer) {
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var ms runtime.MemStats
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runtime.ReadMemStats(&ms)
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fmt.Fprintf(w, "go_memstats_alloc_bytes %d\n", ms.Alloc)
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fmt.Fprintf(w, "go_memstats_alloc_bytes_total %d\n", ms.TotalAlloc)
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fmt.Fprintf(w, "go_memstats_buck_hash_sys_bytes %d\n", ms.BuckHashSys)
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fmt.Fprintf(w, "go_memstats_frees_total %d\n", ms.Frees)
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fmt.Fprintf(w, "go_memstats_gc_cpu_fraction %g\n", ms.GCCPUFraction)
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fmt.Fprintf(w, "go_memstats_gc_sys_bytes %d\n", ms.GCSys)
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fmt.Fprintf(w, "go_memstats_heap_alloc_bytes %d\n", ms.HeapAlloc)
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fmt.Fprintf(w, "go_memstats_heap_idle_bytes %d\n", ms.HeapIdle)
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fmt.Fprintf(w, "go_memstats_heap_inuse_bytes %d\n", ms.HeapInuse)
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fmt.Fprintf(w, "go_memstats_heap_objects %d\n", ms.HeapObjects)
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fmt.Fprintf(w, "go_memstats_heap_released_bytes %d\n", ms.HeapReleased)
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fmt.Fprintf(w, "go_memstats_heap_sys_bytes %d\n", ms.HeapSys)
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fmt.Fprintf(w, "go_memstats_last_gc_time_seconds %g\n", float64(ms.LastGC)/1e9)
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fmt.Fprintf(w, "go_memstats_lookups_total %d\n", ms.Lookups)
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fmt.Fprintf(w, "go_memstats_mallocs_total %d\n", ms.Mallocs)
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fmt.Fprintf(w, "go_memstats_mcache_inuse_bytes %d\n", ms.MCacheInuse)
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fmt.Fprintf(w, "go_memstats_mcache_sys_bytes %d\n", ms.MCacheSys)
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fmt.Fprintf(w, "go_memstats_mspan_inuse_bytes %d\n", ms.MSpanInuse)
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fmt.Fprintf(w, "go_memstats_mspan_sys_bytes %d\n", ms.MSpanSys)
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fmt.Fprintf(w, "go_memstats_next_gc_bytes %d\n", ms.NextGC)
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fmt.Fprintf(w, "go_memstats_other_sys_bytes %d\n", ms.OtherSys)
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fmt.Fprintf(w, "go_memstats_stack_inuse_bytes %d\n", ms.StackInuse)
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fmt.Fprintf(w, "go_memstats_stack_sys_bytes %d\n", ms.StackSys)
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fmt.Fprintf(w, "go_memstats_sys_bytes %d\n", ms.Sys)
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fmt.Fprintf(w, "go_cgo_calls_count %d\n", runtime.NumCgoCall())
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fmt.Fprintf(w, "go_cpu_count %d\n", runtime.NumCPU())
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gcPauses := histogram.NewFast()
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for _, pauseNs := range ms.PauseNs[:] {
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gcPauses.Update(float64(pauseNs) / 1e9)
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}
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phis := []float64{0, 0.25, 0.5, 0.75, 1}
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quantiles := make([]float64, 0, len(phis))
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for i, q := range gcPauses.Quantiles(quantiles[:0], phis) {
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fmt.Fprintf(w, `go_gc_duration_seconds{quantile="%g"} %g`+"\n", phis[i], q)
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}
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fmt.Fprintf(w, `go_gc_duration_seconds_sum %g`+"\n", float64(ms.PauseTotalNs)/1e9)
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fmt.Fprintf(w, `go_gc_duration_seconds_count %d`+"\n", ms.NumGC)
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fmt.Fprintf(w, `go_gc_forced_count %d`+"\n", ms.NumForcedGC)
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fmt.Fprintf(w, `go_gomaxprocs %d`+"\n", runtime.GOMAXPROCS(0))
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fmt.Fprintf(w, `go_goroutines %d`+"\n", runtime.NumGoroutine())
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numThread, _ := runtime.ThreadCreateProfile(nil)
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fmt.Fprintf(w, `go_threads %d`+"\n", numThread)
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// Export build details.
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fmt.Fprintf(w, "go_info{version=%q} 1\n", runtime.Version())
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fmt.Fprintf(w, "go_info_ext{compiler=%q, GOARCH=%q, GOOS=%q, GOROOT=%q} 1\n",
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runtime.Compiler, runtime.GOARCH, runtime.GOOS, runtime.GOROOT())
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}
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64
metrics.go
64
metrics.go
@ -13,11 +13,7 @@
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package metrics
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import (
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"fmt"
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"io"
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"runtime"
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"github.com/valyala/histogram"
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)
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type namedMetric struct {
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@ -33,8 +29,8 @@ var defaultSet = NewSet()
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// WritePrometheus writes all the registered metrics in Prometheus format to w.
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//
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// If exposeProcessMetrics is true, then various `go_*` metrics are exposed
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// for the current process.
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// If exposeProcessMetrics is true, then various `go_*` and `process_*` metrics
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// are exposed for the current process.
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//
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// The WritePrometheus func is usually called inside "/metrics" handler:
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//
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@ -45,61 +41,7 @@ var defaultSet = NewSet()
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func WritePrometheus(w io.Writer, exposeProcessMetrics bool) {
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defaultSet.WritePrometheus(w)
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if exposeProcessMetrics {
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writeGoMetrics(w)
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writeProcessMetrics(w)
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}
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}
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func writeProcessMetrics(w io.Writer) {
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var ms runtime.MemStats
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runtime.ReadMemStats(&ms)
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fmt.Fprintf(w, `go_memstats_alloc_bytes %d`+"\n", ms.Alloc)
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fmt.Fprintf(w, `go_memstats_alloc_bytes_total %d`+"\n", ms.TotalAlloc)
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fmt.Fprintf(w, `go_memstats_buck_hash_sys_bytes %d`+"\n", ms.BuckHashSys)
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fmt.Fprintf(w, `go_memstats_frees_total %d`+"\n", ms.Frees)
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fmt.Fprintf(w, `go_memstats_gc_cpu_fraction %f`+"\n", ms.GCCPUFraction)
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fmt.Fprintf(w, `go_memstats_gc_sys_bytes %d`+"\n", ms.GCSys)
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fmt.Fprintf(w, `go_memstats_heap_alloc_bytes %d`+"\n", ms.HeapAlloc)
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fmt.Fprintf(w, `go_memstats_heap_idle_bytes %d`+"\n", ms.HeapIdle)
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fmt.Fprintf(w, `go_memstats_heap_inuse_bytes %d`+"\n", ms.HeapInuse)
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fmt.Fprintf(w, `go_memstats_heap_objects %d`+"\n", ms.HeapObjects)
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fmt.Fprintf(w, `go_memstats_heap_released_bytes %d`+"\n", ms.HeapReleased)
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fmt.Fprintf(w, `go_memstats_heap_sys_bytes %d`+"\n", ms.HeapSys)
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fmt.Fprintf(w, `go_memstats_last_gc_time_seconds %f`+"\n", float64(ms.LastGC)/1e9)
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fmt.Fprintf(w, `go_memstats_lookups_total %d`+"\n", ms.Lookups)
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fmt.Fprintf(w, `go_memstats_mallocs_total %d`+"\n", ms.Mallocs)
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fmt.Fprintf(w, `go_memstats_mcache_inuse_bytes %d`+"\n", ms.MCacheInuse)
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fmt.Fprintf(w, `go_memstats_mcache_sys_bytes %d`+"\n", ms.MCacheSys)
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fmt.Fprintf(w, `go_memstats_mspan_inuse_bytes %d`+"\n", ms.MSpanInuse)
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fmt.Fprintf(w, `go_memstats_mspan_sys_bytes %d`+"\n", ms.MSpanSys)
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fmt.Fprintf(w, `go_memstats_next_gc_bytes %d`+"\n", ms.NextGC)
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fmt.Fprintf(w, `go_memstats_other_sys_bytes %d`+"\n", ms.OtherSys)
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fmt.Fprintf(w, `go_memstats_stack_inuse_bytes %d`+"\n", ms.StackInuse)
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fmt.Fprintf(w, `go_memstats_stack_sys_bytes %d`+"\n", ms.StackSys)
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fmt.Fprintf(w, `go_memstats_sys_bytes %d`+"\n", ms.Sys)
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fmt.Fprintf(w, `go_cgo_calls_count %d`+"\n", runtime.NumCgoCall())
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fmt.Fprintf(w, `go_cpu_count %d`+"\n", runtime.NumCPU())
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gcPauses := histogram.NewFast()
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for _, pauseNs := range ms.PauseNs[:] {
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gcPauses.Update(float64(pauseNs) / 1e9)
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}
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phis := []float64{0, 0.25, 0.5, 0.75, 1}
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quantiles := make([]float64, 0, len(phis))
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for i, q := range gcPauses.Quantiles(quantiles[:0], phis) {
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fmt.Fprintf(w, `go_gc_duration_seconds{quantile="%g"} %f`+"\n", phis[i], q)
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}
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fmt.Fprintf(w, `go_gc_duration_seconds_sum %f`+"\n", float64(ms.PauseTotalNs)/1e9)
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fmt.Fprintf(w, `go_gc_duration_seconds_count %d`+"\n", ms.NumGC)
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fmt.Fprintf(w, `go_gc_forced_count %d`+"\n", ms.NumForcedGC)
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fmt.Fprintf(w, `go_gomaxprocs %d`+"\n", runtime.GOMAXPROCS(0))
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fmt.Fprintf(w, `go_goroutines %d`+"\n", runtime.NumGoroutine())
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numThread, _ := runtime.ThreadCreateProfile(nil)
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fmt.Fprintf(w, `go_threads %d`+"\n", numThread)
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// Export build details.
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fmt.Fprintf(w, "go_info{version=%q} 1\n", runtime.Version())
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fmt.Fprintf(w, "go_info_ext{compiler=%q, GOARCH=%q, GOOS=%q, GOROOT=%q} 1\n",
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runtime.Compiler, runtime.GOARCH, runtime.GOOS, runtime.GOROOT())
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}
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79
process_metrics_linux.go
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79
process_metrics_linux.go
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@ -0,0 +1,79 @@
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package metrics
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"time"
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)
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const statFilepath = "/proc/self/stat"
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// See https://github.com/prometheus/procfs/blob/a4ac0826abceb44c40fc71daed2b301db498b93e/proc_stat.go#L40 .
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const userHZ = 100
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// See http://man7.org/linux/man-pages/man5/proc.5.html
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type procStat struct {
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State byte
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Ppid int
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Pgrp int
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Session int
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TtyNr int
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Tpgid int
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Flags uint
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Minflt uint
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Cminflt uint
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Majflt uint
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Cmajflt uint
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Utime uint
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Stime uint
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Cutime int
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Cstime int
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Priority int
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Nice int
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NumThreads int
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ItrealValue int
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Starttime uint64
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Vsize uint
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Rss int
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}
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func writeProcessMetrics(w io.Writer) {
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data, err := ioutil.ReadFile(statFilepath)
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if err != nil {
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log.Printf("ERROR: cannot open %s: %s", statFilepath, err)
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return
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}
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// Search for the end of command.
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n := bytes.LastIndex(data, []byte(") "))
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if n < 0 {
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log.Printf("ERROR: cannot find command in parentheses in %q read from %s", data, statFilepath)
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return
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}
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data = data[n+2:]
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var p procStat
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bb := bytes.NewBuffer(data)
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_, err = fmt.Fscanf(bb, "%c %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d",
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&p.State, &p.Ppid, &p.Pgrp, &p.Session, &p.TtyNr, &p.Tpgid, &p.Flags, &p.Minflt, &p.Cminflt, &p.Majflt, &p.Cmajflt,
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&p.Utime, &p.Stime, &p.Cutime, &p.Cstime, &p.Priority, &p.Nice, &p.NumThreads, &p.ItrealValue, &p.Starttime, &p.Vsize, &p.Rss)
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if err != nil {
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log.Printf("ERROR: cannot parse %q read from %s: %s", data, statFilepath, err)
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return
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}
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// It is expensive obtaining `process_open_fds` when big number of file descriptors is opened,
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// don't do it here.
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fmt.Fprintf(w, "process_cpu_seconds_total %g\n", float64(p.Utime+p.Stime)/userHZ)
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fmt.Fprintf(w, "process_major_pagefaults_total %d\n", p.Majflt)
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fmt.Fprintf(w, "process_minor_pagefaults_total %d\n", p.Minflt)
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fmt.Fprintf(w, "process_num_threads %d\n", p.NumThreads)
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fmt.Fprintf(w, "process_resident_memory_bytes %d\n", p.Rss*4096)
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fmt.Fprintf(w, "process_start_time_seconds %d\n", startTimeSeconds)
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fmt.Fprintf(w, "process_virtual_memory_bytes %d\n", p.Vsize)
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}
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var startTimeSeconds = time.Now().Unix()
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11
process_metrics_other.go
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11
process_metrics_other.go
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@ -0,0 +1,11 @@
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// +build !linux
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package metrics
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import (
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"io"
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)
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func writeProcessMetrics(w io.Writer) {
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// TODO: implement it
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}
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